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Thread: 5Hz Sirf IV from Mo-co-so

  1. #1
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    5Hz Sirf IV from Mo-co-so

    MO-CO-SO is selling a 5Hz Sirf IV chipset usb receiver on Ebay. It's the only 5Hz Sirf IV unit I've seen. He doesn't even have it listed on his website.

    http://cgi.ebay.com/ws/eBayISAPI.dll...:X:AAQ:US:1123
    Item: 160939049093

    Is anyone familiar with this unit? I really want a 5Hz receiver to replace my BU-353, but the other options are using inferior chipsets. The one concern I have is the description says the following for update rate: "1Hz default, up to 5Hz". Can anyone decode that for me or clarify how you "switch" off the 1Hz rate to 5Hz? I tried contacting him, but didn't receive a response.

  2. #2
    FLAC SNOtwistR's Avatar
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    I would have a look at the sure development unit http://www.sureelectronics.net/goods.php?id=99 it has various connecton methods and comes with an external antenna. Very good unit fast accurate. Just a thought SNO

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    Some GPS chipsets are read/write, meaning that you can send commands to the chipset to configure various operational parameters (like update rate). 1hz operation is typically associated with a 4800 bps connection, and that is the default NMEA 0183 standard. Keep on mind that the rate your GPS updates data has NOTHING to do with how fast your navigation program updates its position. That's entirely a function of the navigation software. Now many programs do support higher update speeds, but for instance, MS Streets and Trips doesn't. It only operates at 4800bps (1hz). Slower processors can also effect the ability of your system to redraw its screens.

    Bottom line is that you need to make sure all the pieces of your system can take advantage of the higher update rate.

  4. #4
    Maximum Bitrate Mickz's Avatar
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    The QSTAR BT-Q818XT I use can run at 1, 5 or 10hz.

    Garmin PC will accept 5hz data updates, Navigator free will run at 10hz.

    The biggest advantage I find with 5hz or 10hz updates comes when using the GPS for vehicle speed display as there is no lag in the indicated speed.
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  5. #5
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    Quote Originally Posted by VegasGuy View Post
    Some GPS chipsets are read/write, meaning that you can send commands to the chipset to configure various operational parameters (like update rate). 1hz operation is typically associated with a 4800 bps connection, and that is the default NMEA 0183 standard. Keep on mind that the rate your GPS updates data has NOTHING to do with how fast your navigation program updates its position. That's entirely a function of the navigation software. Now many programs do support higher update speeds, but for instance, MS Streets and Trips doesn't. It only operates at 4800bps (1hz). Slower processors can also effect the ability of your system to redraw its screens.

    Bottom line is that you need to make sure all the pieces of your system can take advantage of the higher update rate.
    What update rate does sygic fleet support?

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    1Hz AFAIK.

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